This model describes a time reversal symmetry-breaking system, which might be a magnetic semiconductor with Rashba-type spin-orbit coupling, spin-dependent effective mass, and a uniform magnetization in the \(z\)  direction [1]}. This model can be realized in graphene with \(Fe\)  atoms adsorbed on top, which possesses quantum anomalous Hall effect in the presence of both Rashba spin-orbit coupling and an exchange field [2]}.
